We have or had that in Germany, their mothers would call them and say that their teenager spend too much time on the phone/laptop... and then 4 teenagers would come together to a family in Africa and they had to work with them and live without their Phones/laptops. For a week or so.

Reality TV generally refers to the script-less nature of the shows, rather than any illusion that what's happening is ordinary life for the participants. Scenarios being set up is understood as part of the deal, and often part of the appeal (see shows like Wife-Swap, it's reality TV but the entire point is the artificial scenario)

No, reality shows are scripted shows which are written and advertised in such a way as to seem unscripted. They started out scriptless, but it was quickly realized that drama was easily faked, and so now they are all scripted.